Which of the following will result in a chemical change?
a. melting ice to obtain water
b. drying wood in a shed
c. burning coal in a furnace
d. evaporating alcohol into vapor

acid rain does not usually kill trees directly. instead, it is more likely to weaken the trees by damaging their leaves, limiting the nutrients available to them, or poisoning them with toxic substances slowly released from the soil. the main atmospheric pollutants that affect trees are nitrates and sulphates.